The Lunar Micro is a very light and packable bag for summer backpacking and travelling. Crafted with Polarloft synthetic insulation makes it durable and packable, and less vulnerable to moisture than down which can be useful in damp conditions or against condensation. The single layer construction and offset seams prevent cold spots where the insulation is stitched in place. The anatomical shape reduces the surface area for thermal efficiency, and the zip baffle reduces heat loss keeping you warm. Lunar Micro Sleeping Bag - Long